- 101. Re: [Amps] door knob capacitors (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Fri, 4 Mar 2011 15:14:44 -0600
- okay, Genn; Hi Bill, I know about Ameritron but I usually forget to consider them, thanks. for the reminder. I will take a look at what they have. 73 Rob K5UJ Why don't you just order what you need f
- /archives//html/Amps/2011-03/msg00046.html (8,708 bytes)
- 102. Re: [Amps] door knob capacitors (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Sat, 5 Mar 2011 13:39:13 -0600
- I'm looking at those doorknob caps for sale from Ameritron. Actually they are listed as MFJ but it's all the same now. They have two types: 500 pF 7.5 KV and 170 pF 7.5 KV. They are made by High Ener
- /archives//html/Amps/2011-03/msg00055.html (10,578 bytes)
- 103. Re: [Amps] [amps] Tuner loss (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Fri, 11 Mar 2011 11:07:41 -0600
- No, the mode shouldn't matter. If it does, then the tuner is sub-par. I don't recall ever seeing a fan in a broadcast ATU. Why should hams accept one? A fan is in a ham tuner for two reasons: 1. The
- /archives//html/Amps/2011-03/msg00089.html (8,380 bytes)
- 104. [Amps] copper vs steel /SS /brass conductors in a HF tank circuit (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Tue, 22 Mar 2011 10:42:48 -0500
- steel and s.s. are ferrous metals; they heat up with enough RF current. Too much R. OTOH if you look at conductive properties of silver and copper (undergraduate introductory physics book) they are s
- /archives//html/Amps/2011-03/msg00165.html (6,809 bytes)
- 105. Re: [Amps] copper vs steel /SS /brass conductors in a HF tank circuit (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Tue, 22 Mar 2011 13:27:54 -0500
- This is another one of those things that may vary according to power, duty cycle and tx time. IOW, 1.5 KW RTTY for 10 minutes --> problem. 800 w. SSB for a minute or two maybe not so bad. I like not
- /archives//html/Amps/2011-03/msg00170.html (8,081 bytes)
- 106. Re: [Amps] Homebrew is back.. (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Tue, 29 Mar 2011 17:33:40 -0500
- No thanks. Ceramic tubes--boring. Nothing to see here folks--keep moving. Flex and other plastic--maybe if it breaks you can fix it but I can't. The older I get the more I want descrete components an
- /archives//html/Amps/2011-03/msg00266.html (7,094 bytes)
- 107. Re: [Amps] 813 Amplifier Article (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Thu, 31 Mar 2011 10:47:47 -0500
- Glad to hear it. I had thought 5-125 was almost unobtanium; even harder to find than 5-500s and 4-65As. The only ham rig I have ever heard of, that used the 5-125 was the Eldico TR-1TV which used one
- /archives//html/Amps/2011-03/msg00296.html (8,587 bytes)
- 108. Re: [Amps] 813 Amplifier Article (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Thu, 31 Mar 2011 21:08:47 -0500
- The Temco RA-150 used the 4-65A. I don't have that rig so I'm not interested in the tube but anyone owning that rig might not mind picking up a few extras if they don't have them already. A pretty co
- /archives//html/Amps/2011-03/msg00319.html (8,460 bytes)
- 109. Re: [Amps] 813 Amplifier Article (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Fri, 1 Apr 2011 11:45:08 -0500
- I guess I am mistaken, I somehow got the impression they were hard to find because I never see them at hamfests or on eBay but I guess I have looked at the wrong times and places. 73 Rob K5UJ _______
- /archives//html/Amps/2011-04/msg00005.html (10,679 bytes)
- 110. Re: [Amps] Alpha vs. Henry (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Sun, 3 Apr 2011 11:32:54 -0500
- <<<I owned a Henry 5K Classic X with a pair of 8877's. Bought it new from Henry in 2000. Very good amp but when pushed the tuned input plate choke would start to scream. >>> What's a "tuned input pla
- /archives//html/Amps/2011-04/msg00024.html (7,139 bytes)
- 111. [Amps] source RMC caps (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Tue, 12 Apr 2011 06:43:10 -0500
- Does anyone know of a parts vendor from whom I can purchase 10 or 20 RMC disc ceramic caps? I'd like to get around 200 pF, 6 or 7 KV, N1500 or N750 (if they exist). All I can find are dead ends like
- /archives//html/Amps/2011-04/msg00331.html (6,399 bytes)
- 112. Re: [Amps] Which hearhkit amp would you choose? (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Wed, 13 Apr 2011 12:23:55 -0500
- The reality is that with every commercially manufactured amp there are pros and cons. Each one has its own set of things the mfr. cheaped out on. This is somewhat less the case with high end amps mad
- /archives//html/Amps/2011-04/msg00373.html (9,042 bytes)
- 113. [Amps] big old plate transformer (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Fri, 15 Apr 2011 10:26:54 -0500
- A transformer like that is almost never built for FWB; what is the current rating; sound like a nice pice of iron for an AM rig. Use it insulated from the cabinet so the winding insulation is not the
- /archives//html/Amps/2011-04/msg00443.html (6,644 bytes)
- 114. Re: [Amps] DIN vs N (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Mon, 25 Apr 2011 07:52:22 -0500
- Cell phone sites only run a few watts, no more than 10 or 15. The adapter was probably okay for them. 73 Rob K5UJ _______________________________________________ Amps mailing list Amps@contesting.com
- /archives//html/Amps/2011-04/msg00513.html (6,648 bytes)
- 115. Re: [Amps] 3-1000 Amplifiers (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Mon, 9 May 2011 19:00:27 -0500
- Dick, That BTI amp is the only ham amp I know of. There were some commercial amps made that used the 3-1000 but I forget who made them--Harris maybe. This is one case where if you come across one of
- /archives//html/Amps/2011-05/msg00024.html (7,635 bytes)
- 116. Re: [Amps] 3-1000 Amplifiers (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Tue, 10 May 2011 09:43:31 -0500
- I wonder what would happen if a triode connected 4-1000A were used in that BTI amp? Off-hand I don't know what the filament v. is for the 3x1. Rob K5UJ _______________________________________________
- /archives//html/Amps/2011-05/msg00028.html (9,532 bytes)
- 117. Re: [Amps] 3-1000 Amplifiers (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Tue, 10 May 2011 18:32:05 -0500
- Well Charles, I'll bet you'll find someone willing to take that tube off your hands hi hi, but I sure am sorry to hear about what happend with Allison. That pair 3x1 Henry amp must have been a flame
- /archives//html/Amps/2011-05/msg00039.html (8,247 bytes)
- 118. Re: [Amps] 4-1000A color (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Thu, 26 May 2011 09:19:51 -0500
- I run 3-500zg orange for years with no trouble--you just have to blast the air over them; only RF PA tube I know of that isn't supposed to show color is the 813 and if you look at the plate thickness
- /archives//html/Amps/2011-05/msg00227.html (6,855 bytes)
- 119. Re: [Amps] Alpha 86 or Ten Tec Titan 425.....and why?? (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Sun, 5 Jun 2011 12:22:23 -0500
- I don't know much about those amps except I think both are ceramic tube amps. If they have a lot of gain (requiring very low drive) then AM operating may be touchy depending on the exciter. You may f
- /archives//html/Amps/2011-06/msg00058.html (7,877 bytes)
- 120. Re: [Amps] FW: [Boatanchors] Best Boatanchor 160-10mReceiversforSSB? (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Sun, 5 Jun 2011 12:40:43 -0500
- If you wind up with an old AM/CW rx with a 455 KHz IF you can keep a look out for a hammarlund HC-10 and it will give you SSB coverage and maintain the tube signal chain. I don't know what the prices
- /archives//html/Amps/2011-06/msg00059.html (6,908 bytes)
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